Multi-carrier/multiband frequency-selecting implementation method and circuit

Abstract

The invention relates to an implementation method and circuit of multi-carrier / multiband frequency selection, which are used for implementing frequency selection of multi-carrier / multiband communication equipment. In the implementation method, each path of carrier / band uses the same local oscillator frequency Fo to carry out hybrid frequency in an upper link or a down link; and if the starting frequency of the ith path of carriers / bands of the multi-carrier / multiband communication equipment is shown as Fsi and the stop frequency of the ith path of carriers / bands of the multi-carrier / multiband communication equipment is shown as Fei, the centre frequency Fci of an intermediate-frequency filter which is used by the ith path of carriers / bands is equal to (Fei +Fsi) / 2-Fo. The invention also provides a circuit of multi-carrier / multiband frequency selection. According to the method and circuit, one local oscillator circuit, one upper-conversion mixer and one down-conversion mixer can be shared by the multiple carriers / bands, thus decreasing equipment volume, reducing power consumption, reducing cost and shortening production time.

Description

technical field [0001] The invention relates to the technical field of repeaters, in particular to a method and circuit for realizing multi-carrier frequency / multi-band frequency selection. Background technique [0002] The repeater (repeater) belongs to the same-frequency amplification device, which refers to a radio transmission relay device that enhances the signal during the wireless communication transmission process. The basic function of the repeater is a radio frequency signal power booster. In the downlink of the repeater station, the signal is picked up by the donor antenna from the existing coverage area, and the signal outside the band pass is excellently isolated through the band pass filter, and the filtered signal is amplified by the power amplifier and then transmitted again to the area to be covered. In the uplink path, the signal of the mobile phone in the coverage area is processed by the uplink amplifying link in the same way and then transmitted to the...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the purpose of the present invention is to propose a kind of realization method of multi-carrier frequency / multi-band frequency selection, to solve the problem that each carrier / frequency band of existing multi-carrier frequency / multi-band repeater requires a local oscillator circuit, a separate upper Technical Problems of Converting Mixer and Down-converting Mixer

[0007] Another object of the present invention is to propose a multi-carrier frequency / multi-band frequency selection circuit, which solves the problem that each carrier / frequency band of an existing multi-frequency / multi-band repeater requires a local oscillator circuit and a separate up-conversion Technical Issues of Mixers and Downconverting Mixers

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